The data sheet
for the W530 mentions this for WWAN:
Gobi 3K 14.4Mbps/HSPA + /EVDO
HSPA + 21Mbps (Half Size MC)
Not exactly sure what that is, but it doesn't specifically mention 4G like the other models. I would give them a few days on the color sensor. This seems to happen all the time with their website. Or I suppose if you're trying to order you could order by phone. Then you could haggle with 'em too.
nkPad T400: T9400, 8GB, LG WXGA+, Samsung 830 128GB + WD Scorpio Black 500GB, Intel 5300agn, Win7 Pro x64Others: IBM ThinkPad R40, Sony VAIO NR Series, HP TouchPad running CM9, Jailbroken iPod Touch 4G